At first we thought Lewis Hamilton was dating Gigi Hadid, but then there were rumors that he was after her BFF Kendall Jenner. Either way, Lewis was partying on a luxury yacht with the girls (plus Hailey Baldwin and Bella Hadid) in Monaco last week, so there was definitely SOMETHING going on!

So what does Lewis' former fiancee Nicole Scherzinger have to say about it? Well, nothing, but when asked about it last night at LAX, the singer was all smiles.

Maybe she doesn't care? Or maybe she knows that Lewis' fling with Kendall (or whoever) won't last? After all, just a few weeks it was revealed that Lewis was breaking into the music biz -- and that one of his new tunes was going to be a song for Nicole called "J’adore"!

We have a feeling this love story isn't over yet ... watch your back, Kenny!